US9427842B1 - Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives - Google Patents
Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives Download PDFInfo
- Publication number
- US9427842B1 US9427842B1 US13/537,018 US201213537018A US9427842B1 US 9427842 B1 US9427842 B1 US 9427842B1 US 201213537018 A US201213537018 A US 201213537018A US 9427842 B1 US9427842 B1 US 9427842B1
- Authority
- US
- United States
- Prior art keywords
- twisting
- row bar
- tool
- planar
- force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
- 238000000034 method Methods 0.000 title abstract description 26
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 238000005259 measurement Methods 0.000 claims description 11
- 238000013519 translation Methods 0.000 description 18
- 239000002390 adhesive tape Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229920001651 Cyanoacrylate Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/048—Lapping machines or devices; Accessories designed for working plane surfaces of sliders and magnetic heads of hard disc drives or the like
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
- G11B5/3166—Testing or indicating in relation thereto, e.g. before the fabrication is completed
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
- G11B5/3169—Working or finishing the interfacing surface of heads, e.g. lapping of heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
- G11B5/3173—Batch fabrication, i.e. producing a plurality of head structures in one batch
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
Abstract
Description
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/537,018 US9427842B1 (en) | 2012-06-28 | 2012-06-28 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
US15/234,989 US20160346898A1 (en) | 2012-06-28 | 2016-08-11 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/537,018 US9427842B1 (en) | 2012-06-28 | 2012-06-28 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/234,989 Division US20160346898A1 (en) | 2012-06-28 | 2016-08-11 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
Publications (1)
Publication Number | Publication Date |
---|---|
US9427842B1 true US9427842B1 (en) | 2016-08-30 |
Family
ID=56739384
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/537,018 Active 2033-08-13 US9427842B1 (en) | 2012-06-28 | 2012-06-28 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
US15/234,989 Abandoned US20160346898A1 (en) | 2012-06-28 | 2016-08-11 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/234,989 Abandoned US20160346898A1 (en) | 2012-06-28 | 2016-08-11 | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives |
Country Status (1)
Country | Link |
---|---|
US (2) | US9427842B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150258655A1 (en) * | 2014-03-17 | 2015-09-17 | Seagate Technology Llc | Lapping Device or Carrier with Adaptive Bending Control |
US10183376B1 (en) * | 2015-10-20 | 2019-01-22 | Seagate Technology Llc | Carrier for mounting a bar of sliders or a stack of such bars to be lapped |
CN111148599A (en) * | 2017-12-19 | 2020-05-12 | 西部数据技术公司 | Actuator tilt insert for in-row-grinding mounting tool for magnetic recording head |
Citations (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5203119A (en) * | 1991-03-22 | 1993-04-20 | Read-Rite Corporation | Automated system for lapping air bearing surface of magnetic heads |
US5607340A (en) * | 1995-06-06 | 1997-03-04 | Lackey; Stanley A. | Row tool |
US5620356A (en) * | 1995-01-27 | 1997-04-15 | Lackey; Stanley | Row tool balance and bow correction apparatus |
US5899793A (en) * | 1997-04-10 | 1999-05-04 | Fujitsu, Ltd. | Lapping apparatus including a lapping base having pads |
US6050878A (en) * | 1998-06-25 | 2000-04-18 | Tdk Corporation | Processing jig |
US6093083A (en) * | 1998-05-06 | 2000-07-25 | Advanced Imaging, Inc. | Row carrier for precision lapping of disk drive heads and for handling of heads during the slider fab operation |
US6095895A (en) * | 1997-05-27 | 2000-08-01 | Tdk Corporation | Processing jig |
US6217425B1 (en) * | 1998-06-12 | 2001-04-17 | Tdk Corporation | Apparatus and method for lapping magnetic heads |
US20010004800A1 (en) * | 1997-10-28 | 2001-06-28 | Tdk Corporation | Method for manufacturing thin-film magnetic head and manufacturing system of the head |
US6315636B1 (en) * | 1999-04-21 | 2001-11-13 | Fujitsu Limited | Lapping machine, row tool, and lapping method |
US6315633B1 (en) * | 1998-06-25 | 2001-11-13 | Tdk Corporation | Processing jig |
US20010041319A1 (en) * | 2000-01-13 | 2001-11-15 | Tdk Corporation | Prcocessing jig |
US6375539B1 (en) * | 2000-10-27 | 2002-04-23 | Fujitsu Limited | Lapping machine, lapping method, and row tool |
US20020052172A1 (en) * | 1999-03-19 | 2002-05-02 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US20020077044A1 (en) * | 2000-01-07 | 2002-06-20 | Hiroshi Shindo | Apparatus and method for lapping magnetic heads |
US6447367B1 (en) * | 1999-12-21 | 2002-09-10 | Tdk Corporation | Processing jig |
US20020126421A1 (en) * | 2001-03-08 | 2002-09-12 | Hitachi, Ltd. | Lapping apparatus, magnetic head and method of manufacturing the same |
US6546355B2 (en) | 2000-06-20 | 2003-04-08 | Fujitsu Limited | ABS shape correction method for slider of magnetic head, and ABS shape correction apparatus for slider of magnetic head |
US6599170B2 (en) * | 2000-02-08 | 2003-07-29 | Fujitsu Limited | Method and apparatus for polishing, and lapping jig |
US6604989B2 (en) * | 2000-07-28 | 2003-08-12 | Fujitsu Limited | Manufacturing method and apparatus for magnetic head sliders |
US6662069B1 (en) | 2000-04-06 | 2003-12-09 | Seagate Technology Llc | Slider having independently controlled crown and cross curvature and method of controlling curvature |
US6802761B1 (en) | 2003-03-20 | 2004-10-12 | Hitachi Global Storage Technologies Netherlands B.V. | Pattern-electroplated lapping plates for reduced loads during single slider lapping and process for their fabrication |
US20040209546A1 (en) * | 2001-09-10 | 2004-10-21 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US6831277B1 (en) * | 1998-11-20 | 2004-12-14 | Hitachi, Ltd. | Method for measuring dimensions and alignment of thin film magnetic head and apparatus therefor |
US20050028354A1 (en) * | 2000-06-16 | 2005-02-10 | Tdk Corporation | Device and method for measuring amount of grinding in magnetic head producing process |
US6942544B2 (en) | 2003-09-30 | 2005-09-13 | Hitachi Global Storage Technologies Netherlands B.V. | Method of achieving very high crown-to-camber ratios on magnetic sliders |
US20050237673A1 (en) * | 2004-04-27 | 2005-10-27 | Tdk Corporation | Method for grinding a bar of thin film magnetic elements utilizing a plurality of resistive films |
US7049809B2 (en) | 2004-07-15 | 2006-05-23 | Hitachi Global Storage Technologies Netherlands B.V. | System, method, and apparatus for handling and testing individual sliders in a row-like format in single slider processing systems |
US20060160473A1 (en) * | 2004-10-18 | 2006-07-20 | Sae Magnetics (H.K) Ltd. | Fixture for slider lapping, lapping device and lapping method |
US7147539B1 (en) * | 2000-08-09 | 2006-12-12 | Seagate Technology Llc | Head performance based nano-machining process control for stripe forming of advanced sliders |
US20070209437A1 (en) * | 2005-10-18 | 2007-09-13 | Seagate Technology Llc | Magnetic MEMS device |
US20080022510A1 (en) * | 2006-07-21 | 2008-01-31 | Hitachi Global Storage Technologies Netherlands B.V. | Method of manufacturing magnetic head slider |
US7467460B2 (en) | 2006-01-27 | 2008-12-23 | Sae Magnetics (H.K.) Ltd. | Method of manufacturing slider |
US20090061737A1 (en) * | 2007-08-29 | 2009-03-05 | Fujitsu Limited | Lapping apparatus and lapping method |
US7562435B2 (en) | 2005-03-24 | 2009-07-21 | Sae Magnetics (H.K.) Ltd. | Method to improve crown sigma control of the slider in a hard disk drive |
US20090313811A1 (en) * | 2008-06-18 | 2009-12-24 | Toshio Takahashi | Method of manufacturing a perpendicular magnetic recording head |
US7681303B2 (en) * | 2006-09-01 | 2010-03-23 | Hitachi Global Storage Technologies Netherlands B.V. | Method for manufacturing a magnetic head slider |
-
2012
- 2012-06-28 US US13/537,018 patent/US9427842B1/en active Active
-
2016
- 2016-08-11 US US15/234,989 patent/US20160346898A1/en not_active Abandoned
Patent Citations (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5203119A (en) * | 1991-03-22 | 1993-04-20 | Read-Rite Corporation | Automated system for lapping air bearing surface of magnetic heads |
US5620356A (en) * | 1995-01-27 | 1997-04-15 | Lackey; Stanley | Row tool balance and bow correction apparatus |
US5607340A (en) * | 1995-06-06 | 1997-03-04 | Lackey; Stanley A. | Row tool |
US5899793A (en) * | 1997-04-10 | 1999-05-04 | Fujitsu, Ltd. | Lapping apparatus including a lapping base having pads |
US6095895A (en) * | 1997-05-27 | 2000-08-01 | Tdk Corporation | Processing jig |
US20010004800A1 (en) * | 1997-10-28 | 2001-06-28 | Tdk Corporation | Method for manufacturing thin-film magnetic head and manufacturing system of the head |
US6093083A (en) * | 1998-05-06 | 2000-07-25 | Advanced Imaging, Inc. | Row carrier for precision lapping of disk drive heads and for handling of heads during the slider fab operation |
US6261165B1 (en) | 1998-05-06 | 2001-07-17 | Advanced Imaging | Row carrier for precision lapping of disk drive heads and for handling of heads during the slider fab operation |
US6217425B1 (en) * | 1998-06-12 | 2001-04-17 | Tdk Corporation | Apparatus and method for lapping magnetic heads |
US6050878A (en) * | 1998-06-25 | 2000-04-18 | Tdk Corporation | Processing jig |
US6315633B1 (en) * | 1998-06-25 | 2001-11-13 | Tdk Corporation | Processing jig |
US6831277B1 (en) * | 1998-11-20 | 2004-12-14 | Hitachi, Ltd. | Method for measuring dimensions and alignment of thin film magnetic head and apparatus therefor |
US20020052172A1 (en) * | 1999-03-19 | 2002-05-02 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US6722947B2 (en) | 1999-03-19 | 2004-04-20 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US6315636B1 (en) * | 1999-04-21 | 2001-11-13 | Fujitsu Limited | Lapping machine, row tool, and lapping method |
US6447367B1 (en) * | 1999-12-21 | 2002-09-10 | Tdk Corporation | Processing jig |
US6758721B2 (en) * | 2000-01-07 | 2004-07-06 | Tdk Corporation | Apparatus and method for lapping magnetic heads |
US20020077044A1 (en) * | 2000-01-07 | 2002-06-20 | Hiroshi Shindo | Apparatus and method for lapping magnetic heads |
US20010041319A1 (en) * | 2000-01-13 | 2001-11-15 | Tdk Corporation | Prcocessing jig |
US6599170B2 (en) * | 2000-02-08 | 2003-07-29 | Fujitsu Limited | Method and apparatus for polishing, and lapping jig |
US6662069B1 (en) | 2000-04-06 | 2003-12-09 | Seagate Technology Llc | Slider having independently controlled crown and cross curvature and method of controlling curvature |
US20050028354A1 (en) * | 2000-06-16 | 2005-02-10 | Tdk Corporation | Device and method for measuring amount of grinding in magnetic head producing process |
US6546355B2 (en) | 2000-06-20 | 2003-04-08 | Fujitsu Limited | ABS shape correction method for slider of magnetic head, and ABS shape correction apparatus for slider of magnetic head |
US6604989B2 (en) * | 2000-07-28 | 2003-08-12 | Fujitsu Limited | Manufacturing method and apparatus for magnetic head sliders |
US7147539B1 (en) * | 2000-08-09 | 2006-12-12 | Seagate Technology Llc | Head performance based nano-machining process control for stripe forming of advanced sliders |
US20020052164A1 (en) * | 2000-10-27 | 2002-05-02 | Fujitsu Limited | Lapping machine, lapping method, and row tool |
US6375539B1 (en) * | 2000-10-27 | 2002-04-23 | Fujitsu Limited | Lapping machine, lapping method, and row tool |
US20020126421A1 (en) * | 2001-03-08 | 2002-09-12 | Hitachi, Ltd. | Lapping apparatus, magnetic head and method of manufacturing the same |
US7014532B2 (en) * | 2001-09-10 | 2006-03-21 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US20040209546A1 (en) * | 2001-09-10 | 2004-10-21 | Fujitsu Limited | Lapping machine, lapping method, and method of manufacturing magnetic head |
US6802761B1 (en) | 2003-03-20 | 2004-10-12 | Hitachi Global Storage Technologies Netherlands B.V. | Pattern-electroplated lapping plates for reduced loads during single slider lapping and process for their fabrication |
US6942544B2 (en) | 2003-09-30 | 2005-09-13 | Hitachi Global Storage Technologies Netherlands B.V. | Method of achieving very high crown-to-camber ratios on magnetic sliders |
US20050237673A1 (en) * | 2004-04-27 | 2005-10-27 | Tdk Corporation | Method for grinding a bar of thin film magnetic elements utilizing a plurality of resistive films |
US7049809B2 (en) | 2004-07-15 | 2006-05-23 | Hitachi Global Storage Technologies Netherlands B.V. | System, method, and apparatus for handling and testing individual sliders in a row-like format in single slider processing systems |
US7153198B2 (en) * | 2004-10-18 | 2006-12-26 | Sae Magnetics (H.K.) Ltd. | Fixture for slider lapping, lapping device and lapping method |
US20060160473A1 (en) * | 2004-10-18 | 2006-07-20 | Sae Magnetics (H.K) Ltd. | Fixture for slider lapping, lapping device and lapping method |
US7562435B2 (en) | 2005-03-24 | 2009-07-21 | Sae Magnetics (H.K.) Ltd. | Method to improve crown sigma control of the slider in a hard disk drive |
US20070209437A1 (en) * | 2005-10-18 | 2007-09-13 | Seagate Technology Llc | Magnetic MEMS device |
US7467460B2 (en) | 2006-01-27 | 2008-12-23 | Sae Magnetics (H.K.) Ltd. | Method of manufacturing slider |
US20080022510A1 (en) * | 2006-07-21 | 2008-01-31 | Hitachi Global Storage Technologies Netherlands B.V. | Method of manufacturing magnetic head slider |
US7634850B2 (en) * | 2006-07-21 | 2009-12-22 | Hitachi Global Storage Technologies Netherlands B.V. | Method of manufacturing magnetic head slider |
US7681303B2 (en) * | 2006-09-01 | 2010-03-23 | Hitachi Global Storage Technologies Netherlands B.V. | Method for manufacturing a magnetic head slider |
US20090061737A1 (en) * | 2007-08-29 | 2009-03-05 | Fujitsu Limited | Lapping apparatus and lapping method |
US20090313811A1 (en) * | 2008-06-18 | 2009-12-24 | Toshio Takahashi | Method of manufacturing a perpendicular magnetic recording head |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150258655A1 (en) * | 2014-03-17 | 2015-09-17 | Seagate Technology Llc | Lapping Device or Carrier with Adaptive Bending Control |
US10843305B2 (en) * | 2014-03-17 | 2020-11-24 | Seagate Technology Llc | Lapping device or carrier with adaptive bending control |
US10183376B1 (en) * | 2015-10-20 | 2019-01-22 | Seagate Technology Llc | Carrier for mounting a bar of sliders or a stack of such bars to be lapped |
CN111148599A (en) * | 2017-12-19 | 2020-05-12 | 西部数据技术公司 | Actuator tilt insert for in-row-grinding mounting tool for magnetic recording head |
Also Published As
Publication number | Publication date |
---|---|
US20160346898A1 (en) | 2016-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8165709B1 (en) | Four pad self-calibrating electronic lapping guide | |
USRE38340E1 (en) | Multi-point bending of bars during fabrication of magnetic recording heads | |
JP3537726B2 (en) | Method and apparatus for polishing and lapping jig | |
US20160346898A1 (en) | Systems and methods for correcting read/write overlay errors in the manufacture of magnetic transducers for storage drives | |
US6758722B2 (en) | Dual-purpose lapping guide for the production of magneto-resistive heads | |
CN110666594B (en) | Method of grinding while heating one or more features and associated slide, bar and system | |
US5951371A (en) | Multi-point bending of bars during fabrication of magnetic recording heads | |
JP3693816B2 (en) | Processing jig | |
US8082658B2 (en) | Controlled lapping for an ABS damascene process | |
US6447367B1 (en) | Processing jig | |
JP3569474B2 (en) | Processing jig | |
JP3638815B2 (en) | Row tool and wrapping machine using the row tool | |
US20150380027A1 (en) | Transducer resistor shunt structure for low-cost probing | |
WO2000056502A1 (en) | Lapping machine, lapping method, and method of fabricating magnetic head | |
US20030140491A1 (en) | Device and method for measuring amount of grinding in magnetic head producing process | |
CN101425295B (en) | Manufacturing method for magnetic head sliding block | |
JP4024789B2 (en) | Lapping machine and lapping method | |
US6315633B1 (en) | Processing jig | |
US8117736B2 (en) | Method of lapping a magnetic head slider | |
JP3648114B2 (en) | Thin film magnetic head material polishing apparatus, polishing jig, and slider manufacturing method | |
JP2001236621A (en) | Device and method for polishing magnetic head | |
JP2008226408A (en) | Method and device for processing magnetic head slider | |
CN107767882B (en) | Guiding element is ground for the wire bonding electricity with head module | |
CN104070448A (en) | Fixture for grinding of elongated members, grinding device of elongated members, and grinding method of elongated members | |
WO1998019828A1 (en) | Multi-point bending of bars during fabrication of magnetic recording heads |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MORAVEC, MARK D.;SUPAVASUTHI, CHAKKRIT;YAEMGLIN, THEERA;REEL/FRAME:028767/0746 Effective date: 20120723 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038744/0481 Effective date: 20160512 Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038722/0229 Effective date: 20160512 Owner name: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT, CALIFORNIA Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038744/0281 Effective date: 20160512 Owner name: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGEN Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038744/0281 Effective date: 20160512 Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, IL Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038722/0229 Effective date: 20160512 Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, IL Free format text: SECURITY AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:038744/0481 Effective date: 20160512 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT;REEL/FRAME:045501/0714 Effective date: 20180227 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
AS | Assignment |
Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: RELEASE OF SECURITY INTEREST AT REEL 038744 FRAME 0481;ASSIGNOR:JPMORGAN CHASE BANK, N.A.;REEL/FRAME:058982/0556 Effective date: 20220203 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Free format text: PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:064715/0001 Effective date: 20230818 Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Free format text: PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:067045/0156 Effective date: 20230818 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |